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US 5,525,120 AGranted
Degreasing process
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsRudolf Zauns-Huber, Alfred Meffert, Klaus Herrmann, Wolfgang Prinz, Fredi Wolter
Life of this patent
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Abstract
The invention is a process for degreasing animal skins in which the animal skin to be degreased is contacted with a mixture of a predominantly saturated C.sub.12 -C.sub.18 fatty alcohol ethoxylate having an average of not more than 15 EO groups and a predominantly saturated C.sub.6-10 fatty alcohol ethoxylate having an average of not more than 3 EO groups.
Claims21
A process for degreasing skins, pelts, hides and leathers which comprises:
- contacting the skins, pelts, hides and leathers to be degreased with a composition comprising
- (a) a C.sub.12-18 fatty alcohol ethoxylate containing, on average, more than 6 EO groups in the molecule;
- and
- (b) a head-fractionated fatty alcohol ethoxylate containing not more than 3 EO groups in the molecule, wherein,
- i) the fatty alcohol residues in components (a) and (b) have an iodine value below 20 and
- ii) component (b) is present in an amount of from about 2 to 25% by weight, based on the weight of (a) and (b).
3 more elements
A degreasing composition for the degreasing of skins, pelts, hides and leathers comprising a mixture of
- (a) C.sub.12-18 fatty alcohol ethoxylate containing an average of more than 6 EO groups in the molecule;
- and
- (b) a head-fractionated fatty alcohol ethoxylate containing an average of not more than 3 EO groups in the molecule;
- wherein,
- i) the fatty alcohol residues in components (a) and (b) have an iodine value below 20 and
- ii) component (b) is present in an amount of about 2 to 25% by weight, based on the weight of (a) and (b);
- wherein
- iii) component (b) comprises a head-fractionated C.sub.8 fatty alcohol ethoxylate with an average number of EO groups of 1.5 to 2.5 and optionally
- iv) (a) comprises a mixture of (a1) a saturated C.sub.12-18 fatty alcohol ethoxylate with an average of 6 to 8 EO groups, and
- (a2) a saturated C.sub.12-18 fatty alcohol ethoxylate with an average of about 9 to 12 EO groups, the mixing ratio between components (a1) and (a2) being not less than 2:1, and optionally
- v) components (a) and (b) comprise a solution in a biodegradable solvent, liquid at room temperature, selected from the group consisting of carboxylic acid esters, ethers, alcohols and carbonic acid esters having a flash point above 100.degree. C.,
- components (a) and (b) being present in an amount of 5 to 90% by weight, based on the weight of (a) and (b) and the biodegradable solvent.
9 more elements
Dependencies are inferred from the claim text.